Welcome to the North American Subaru Impreza Owners Club Wednesday June 20, 2018
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > FA Series Factory 2.0L Turbo Powertrain

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 04-14-2016, 10:06 AM   #1
joshua_15wrx
Scooby Newbie
 
Member#: 411847
Join Date: Jan 2015
Chapter/Region: MWSOC
Vehicle:
2015 WRX Premium
WR Blue

Lightbulb Crawford V3 AOS - 2015 WRX - Install Tips

Just installed the Crawford AOS V3 on my 2015 WRX. A few things...

1) The hose clamps they send you are total pieces of s*hit. You will need 10 #6 and 2 #8 clamps. I got a 2 pack of the #8 at Lowe's and a 10 pack of the #6 at Home Depot. Both stainless steel and much better quality.

2) The instructions Crawford provides are somewhat helpful. I found an install thread here at NASIOC that was much more helpful. Crawford also has an install video that, to my surprise, it's different than the .pdf instructions. Use all 3.

3) You will need a LOT of patience. Attaching the new hoses and securing them with the clamps is a very frustrating process. Having a bunch of tools certainly helped a lot. Having someone to help you and provide lighting is a must.

4) If you are planning on getting a brake master cylinder brace, get the Perrin not Cusco version. The Cusco version will interfere with the AOS due to the screw (that goes to the cylinder) being too long.

5) When installing the coolant lines, keep the radiator cap on (closed). Also have the new hose nearby such that you can put it on the coolant line as soon as you remove the OEM one. This will help you avoid wasting coolant and the consequent mess.

6) The primary air hose (thickest one) that goes from the top of the AOS to the turbo inlet is too long. I had to cut ~3 inches so that it fit properly. Also do not secure it to the manifold (using tight-wraps / straps) until you have connected all the hoses to the AOS. Trust me...

7) When you remove the intercooler, clean the inside of the inlet and the charge pipe as well. You will find a nasty oil film on it. Don't panic, this is why you got an AOS for.

8) Once you're done take the car for a spin and make sure it goes up to normal operating temperature. Inspect the coolant lines for leaks and make sure all other lines are secure.

9) This mod is not for the faint of heart. If your mechanic skills are lacking, let someone else do it. I would rate the difficulty of the install at a 4 out of 5.

Best of luck! Let me know if you have questions or if you need help with the install around the Cincinnati area. Cheers!
* Registered users of the site do not see these ads.

Last edited by joshua_15wrx; 06-10-2016 at 12:27 PM.
joshua_15wrx is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 04-14-2016, 11:02 AM   #2
Cisco Kidd
Scooby Specialist
 
Member#: 418558
Join Date: Apr 2015
Location: Left Coast
Vehicle:
2015 WRX

Default

Got to install mine, what was time it took you roughly
Cisco Kidd is offline   Reply With Quote
Old 04-14-2016, 11:20 AM   #3
joshua_15wrx
Scooby Newbie
 
Member#: 411847
Join Date: Jan 2015
Chapter/Region: MWSOC
Vehicle:
2015 WRX Premium
WR Blue

Default

Quote:
Originally Posted by Cisco Kidd View Post
Got to install mine, what was time it took you roughly
Net time, like 3-4 hours. Get the hose clamps in advance and you should be all set.
joshua_15wrx is offline   Reply With Quote
Old 04-14-2016, 11:39 AM   #4
Cisco Kidd
Scooby Specialist
 
Member#: 418558
Join Date: Apr 2015
Location: Left Coast
Vehicle:
2015 WRX

Default

Yes I have already ordered hose clamps Did you feel any need to replace the provided hoses w any of better quality to prevent any collapsing as some have mentioned w one of the specific lines? Although Crawford says that is normal and not of concern. This along w an EGR delete is definitely worthwhile.
Cisco Kidd is offline   Reply With Quote
Old 04-14-2016, 12:43 PM   #5
joshua_15wrx
Scooby Newbie
 
Member#: 411847
Join Date: Jan 2015
Chapter/Region: MWSOC
Vehicle:
2015 WRX Premium
WR Blue

Default

Quote:
Originally Posted by Cisco Kidd View Post
Yes I have already ordered hose clamps Did you feel any need to replace the provided hoses w any of better quality to prevent any collapsing as some have mentioned w one of the specific lines? Although Crawford says that is normal and not of concern. This along w an EGR delete is definitely worthwhile.
For peace of mind and longevity I would advise to get better clamps.

Initially I started the install using their clamps. When I was almost done one of them (going to coolant line) broke while tightening. That's why I got better ones and replaced them all.
joshua_15wrx is offline   Reply With Quote
Old 10-02-2016, 10:46 AM   #6
1sikRX
Scooby Newbie
 
Member#: 418222
Join Date: Apr 2015
Default

Quote:
Originally Posted by joshua_15wrx View Post
For peace of mind and longevity I would advise to get better clamps.

Initially I started the install using their clamps. When I was almost done one of them (going to coolant line) broke while tightening. That's why I got better ones and replaced them all.
Can't you explain what size clamps you had to get gonna be doing this install soon, thanks.
1sikRX is offline   Reply With Quote
Old 05-05-2017, 01:43 PM   #7
djemzine
Scooby Newbie
 
Member#: 361609
Join Date: Jul 2013
Chapter/Region: E. Canada
Location: Richmond Hill, ON, Canada
Vehicle:
2015 WRX CVT
WRB Pearl

Default

Just bumping this thread to see if the V3 AOS is heated by coolant, like the IAG?
djemzine is offline   Reply With Quote
Old 05-08-2017, 10:09 AM   #8
uofime
Scooby Specialist
 
Member#: 421271
Join Date: May 2015
Chapter/Region: MWSOC
Location: Chicago
Vehicle:
2015 WRX
Galaxy Blue Pearl

Default

Quote:
Originally Posted by djemzine View Post
Just bumping this thread to see if the V3 AOS is heated by coolant, like the IAG?
Why didn't you just look at the install instruction, maybe see if coolant lines are involved?
uofime is offline   Reply With Quote
Old 05-09-2017, 08:39 PM   #9
Supple1
Scooby Newbie
 
Member#: 316143
Join Date: Apr 2012
Default

Quote:
Originally Posted by djemzine View Post
Just bumping this thread to see if the V3 AOS is heated by coolant, like the IAG?


It is heated by coolant
Supple1 is offline   Reply With Quote
Old 07-22-2017, 07:57 PM   #10
Crawford Performance
NASIOC Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Ontario Ca.
Default

Quote:
Originally Posted by Supple1 View Post
It is heated by coolant
Correct, it is heated by coolant but it is also in a location where it does not get a cold air blast from the hood scoop like our V1 and V2 AOS.

After 3 years of use / testing on this Dual chamber AOS we will be deleting the coolant lines on our next manufacturing batch. We have found that there is no need for heating our Dual Chamber AOS to keep the sludge buildup from happening inside the unit.
Our Dual Chamber V3 for the BRZ has been on the market now for 5 years without any coolant lines and without any sludge buildup issues. Our new Dual Chamber V3 for the EJ platform does not have any coolant lines as well and also does not have any sludge buildup.

Crawford, Quirt
Crawford Performance is offline   Reply With Quote
Old 07-22-2017, 08:27 PM   #11
Bigfella
Scooby Newbie
 
Member#: 444734
Join Date: Apr 2016
Default

I've being running my V3 on my XT with no coolant lines connected for just over 1 year and it doesn't have any condensation problems.
I live in a climate which is probably similar to CA, so I cant say if it would be the case in other climates.

My unit is also relocated back to were the LHD brake master cylinder lives.
Bigfella is offline   Reply With Quote
Old 07-23-2017, 10:47 AM   #12
Crawford Performance
NASIOC Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Ontario Ca.
Default

Quote:
Originally Posted by Bigfella View Post
I've being running my V3 on my XT with no coolant lines connected for just over 1 year and it doesn't have any condensation problems.
I live in a climate which is probably similar to CA, so I cant say if it would be the case in other climates.

My unit is also relocated back to were the LHD brake master cylinder lives.
This is good to hear and totally expected from our Dual Chamber AOS.
Crawford Performance is offline   Reply With Quote
Old 07-24-2017, 02:44 PM   #13
documentarian
Scooby Newbie
 
Member#: 382402
Join Date: Feb 2014
Location: Colorado
Vehicle:
15 wrx

Default

Quote:
Originally Posted by Crawford Performance View Post
Correct, it is heated by coolant but it is also in a location where it does not get a cold air blast from the hood scoop like our V1 and V2 AOS.

After 3 years of use / testing on this Dual chamber AOS we will be deleting the coolant lines on our next manufacturing batch. We have found that there is no need for heating our Dual Chamber AOS to keep the sludge buildup from happening inside the unit.
Our Dual Chamber V3 for the BRZ has been on the market now for 5 years without any coolant lines and without any sludge buildup issues. Our new Dual Chamber V3 for the EJ platform does not have any coolant lines as well and also does not have any sludge buildup.

Crawford, Quirt
Is there any chance that you might provide your customers with the option to get it with or without the coolant lines? I live in a place that gets pretty cold in the winter and was interested in purchasing one of your v3's specifically because it has coolant heating, keeps the oem pvc valve and the ease of installation.
documentarian is offline   Reply With Quote
Old 07-24-2017, 08:08 PM   #14
Crawford Performance
NASIOC Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Ontario Ca.
Default

Quote:
Originally Posted by documentarian View Post
Is there any chance that you might provide your customers with the option to get it with or without the coolant lines? I live in a place that gets pretty cold in the winter and was interested in purchasing one of your v3's specifically because it has coolant heating, keeps the oem pvc valve and the ease of installation.
At the moment we have hundreds of the DIT units in stock that have coolant lines so you should be good on ordering one. That said, if we feel there is a need for coolant lines in a climate like yours then we will add them back into the manufacturing process instantly

Team Crawford
Crawford Performance is offline   Reply With Quote
Old 08-22-2017, 06:34 PM   #15
lowbee
Scooby Newbie
 
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:
2011 STi

Default

Is the a link to more information about the Dual Chamber design of v3 and why it is superior to v2 ?
A few pics would be nice
lowbee is offline   Reply With Quote
Old 08-22-2017, 09:07 PM   #16
Crawford Performance
NASIOC Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Ontario Ca.
Default

Quote:
Originally Posted by lowbee View Post
Is the a link to more information about the Dual Chamber design of v3 and why it is superior to v2 ?
A few pics would be nice
Here is a link to some info on our website; https://crawfordperformance.com/blog...-oil-separator

One of the best things about the dual chamber design found on all our V3 AOS is there is no need to take it off to have your car smoged. Our Dual Chamber V3 retains all the original smog components and they are still located in their stock locations.
The install time is easily 50% less so the install cost will also be 50% less.

FYI, we are having a Group Buy at the moment with the potential for a 30% discount on the retail price. https://forums.nasioc.com/forums/sho...6#post45295716

Last edited by Crawford Performance; 05-07-2018 at 09:12 PM. Reason: broken link
Crawford Performance is offline   Reply With Quote
Old 08-22-2017, 10:24 PM   #17
lowbee
Scooby Newbie
 
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:
2011 STi

Default

So I read the installation instruction and please let me know if my understanding below is correct...
  1. Port 4 double as the oil return line as well as vent from Crankcase
  2. This V3 AOS provide NO AOS function for the potential path from the 2 valve (rocker) cover vents to the intake duct on a EJ engine
lowbee is offline   Reply With Quote
Old 08-22-2017, 10:42 PM   #18
Crawford Performance
NASIOC Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Ontario Ca.
Default

Quote:
Originally Posted by lowbee View Post
So I read the installation instruction and please let me know if my understanding below is correct...
  1. Port 4 double as the oil return line as well as vent from Crankcase
  2. This V3 AOS provide NO AOS function for the potential path from the 2 valve (rocker) cover vents to the intake duct on a EJ engine
That's correct, the port that comes from the PCV valve is also where the de-atomized oil returns to the crankcase.

The ports you are speaking of that go to the valve covers on an EJ motor are not a vent for the valve covers as you stated. This is where the air enters the motor so it can vent out the center crankcase vent, with the system connected this way there is no moisture buildup within the motor or any of its venting hoses as it is all sucked out through the PCV valve and through the other side of the crankcase vent which goes to the intake tube.

QC

Last edited by Crawford Performance; 08-26-2017 at 02:55 PM. Reason: clarity for an EJ motor
Crawford Performance is offline   Reply With Quote
Old 08-22-2017, 10:53 PM   #19
lowbee
Scooby Newbie
 
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:
2011 STi

Default

Quote:
Originally Posted by Crawford Performance View Post
....The ports you are speaking of that go to the valve covers are not a vent for the valve covers as you stated. This is where the air enters the motor so it can vent out the center crankcase vent......
Thanks for the quick response. So those 2 valve cover ports are inlets to the motor only and under no condition does the flow reverse ?

Can you help me understand why other AOS and dual catch can setup put AOS function on those 2 ports back to the intake duct ?

I want to believe you but I just need a little more help before I put a deposit down
lowbee is offline   Reply With Quote
Old 08-22-2017, 11:08 PM   #20
Crawford Performance
NASIOC Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Ontario Ca.
Default

Quote:
Originally Posted by lowbee View Post
Thanks for the quick response. So those 2 valve cover ports are inlets to the motor only and under no condition does the flow reverse ?

Can you help me understand why other AOS and dual catch can setup put AOS function on those 2 ports back to the intake duct ?

I want to believe you but I just need a little more help before I put a deposit down
Your welcome,

If you have a broken piston then there could be more crankcase pressure than can make it out the block vent, in this scenario air could change direction and come out the valve covers. On our V3 AOS for the FA motors we have these lines going through a second chamber within the AOS just in case, but we have never seen any oil enter this second chamber.

Almost all the other AOS units on the market followed our hose routing on our V1 and V2 units as we were the first company to design a specific AOS system for the Boxer.

If you purchase our AOS and it does now work as stated then we will be happy to return your moneys.

QC
Crawford Performance is offline   Reply With Quote
Old 08-22-2017, 11:55 PM   #21
lowbee
Scooby Newbie
 
Member#: 254317
Join Date: Aug 2010
Location: Toronto, Canada
Vehicle:
2011 STi

Default

Quote:
Originally Posted by Crawford Performance View Post
....If you purchase our AOS and it does now work as stated then we will be happy to return your moneys....
That's good to know. Last couple of questions
  1. What is the capacity of the AOS ? How much oil can it hold ?
  2. Does the oil only drain back to the pan when engine is off ?
lowbee is offline   Reply With Quote
Old 08-23-2017, 12:10 AM   #22
Crawford Performance
NASIOC Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Ontario Ca.
Default

Quote:
Originally Posted by lowbee View Post
That's good to know. Last couple of questions
  1. What is the capacity of the AOS ? How much oil can it hold ?
  2. Does the oil only drain back to the pan when engine is off ?
I am not sure of the capacity as it is not designed to hold oil, rather separate the oil mist from the air.

The oil drains back whenever the PCV valve is open, which is whenever there is manifold vacuum. While making boost the PCV valve is closed.

We have been using our Dual Chamber V3 AOS on our boosted BRZ for almost 5 years now, it is also used on the DIT platform that has been out for the same amount of time. Our Dual Chamber V3 system / concept has been working fantastic with zero issues.

QC
Crawford Performance is offline   Reply With Quote
Old 08-23-2017, 12:34 PM   #23
WRXTACY
Scooby Newbie
 
Member#: 15339
Join Date: Feb 2002
Chapter/Region: BAIC
Location: Alameda, CA
Vehicle:
2015 CWP WRX
Flex Fuel tune by Phatron

Default

will this AOS fit with the Cobb Flex Fuel kit? the fuel lines are different.

also the AOS will come with the new high pressure hoses to prevent them from collapsing?

thanks
WRXTACY is offline   Reply With Quote
Old 08-23-2017, 12:50 PM   #24
Crawford Performance
NASIOC Vendor
 
Member#: 42075
Join Date: Aug 2003
Chapter/Region: SCIC
Location: Ontario Ca.
Default

Quote:
Originally Posted by WRXTACY View Post
will this AOS fit with the Cobb Flex Fuel kit? the fuel lines are different.

also the AOS will come with the new high pressure hoses to prevent them from collapsing?

thanks
Correct, my car has flex fuel which is the one I designed the AOS on, so fitment with the flex fuel lines is good.

And the one hose that sees vacuum has been replaced with a high pressure hose to prevent collapsing which has been seen on a handful of installs. FYI,My personal car still has the original style hose which has been on it for 40K miles now.

QC
Crawford Performance is offline   Reply With Quote
Old 08-23-2017, 04:35 PM   #25
WRXTACY
Scooby Newbie
 
Member#: 15339
Join Date: Feb 2002
Chapter/Region: BAIC
Location: Alameda, CA
Vehicle:
2015 CWP WRX
Flex Fuel tune by Phatron

Default

thanks for the quick responses...one last question before I put my deposit in for the group buy... will this fit if I have a Process West Verticooler? thanks
WRXTACY is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

All times are GMT -4. The time now is 01:39 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2018 Axivo Inc.
Copyright ©1999 - 2017, North American Subaru Impreza Owners Club, Inc.